INCOME TAXES - Deferred Income Taxes Components (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carryforward	$ 94,003	$ 93,056
General business credit	17,293	16,364
Stock options	12,809	14,851
Intangible assets, definite-lived	7,239	8,047
Section 174 research & development	4,840	0
Inventory	2,145	1,790
Operating lease liability	568	734
Property & equipment	137	284
Other	310	339
Total deferred tax assets	139,344	135,465
Valuation allowance	(138,710)	(131,839)
Deferred tax assets	634	3,626
Deferred tax liabilities:
Debt amortization	(24)	(2,933)
Right of use asset	(527)	(693)
Finance lease liability	(83)	0
Total deferred tax liabilities	(634)	(3,626)
Net deferred taxes	$ 0	$ 0